Narrowing searches based on url, author, date, and other attributes is also possible. For instance, the query [ Streisand sourcename:Techdirt ] restricts searches for "Streisand" to items from the blog "Techdirt".
Examples of other operators follow:

sourceurl:http://www.theverge.com/

items from the blog http://www.theverge.com/

sourcename:"New York"

items from blogs with "New York" in the name

date:10/20/11

items that appeared on 10/20/11

date:[10/1/11 TO 10/20/11]

items appearing between 10/1/11 and 10/20/11

author:"Bill Gates"

items by author "Bill Gates"

title:unsubstantiated

items with "unsubstantiated" in the title

body:"severely polluted"

items with "severely polluted" in the body

link:http://www.marco.org/2011/04/16/rumored-apple-hdtv

items linking to http://www.marco.org/2011/04/16/rumored-apple-hdtv

Note: all operators that take urls will accept simple domain names, which match any item at that domain, or complete item urls.

A look at Apple's R&D expenditures from 1995-2013
— For a company that makes as much money as Apple, you might be surprised to learn that it spends far less on Research and Development (R&D) than many of its competitors, including bigwigs like Google, Microsoft, and Samsung.

Apple publishes Chinese New Year gift guide
— Apple has enjoyed a recent burst of success in China, with the new iPad mini selling out faster than supplies can be replenished, but rather than sitting back and enjoying the regional boom, the company is going on the offensive with a new Chinese New Year Gift Guide.

Apple proposing new Bonjour sharing standard
— In order to remedy the woes many universities are experiencing using Apple's Bonjour zero-configuration Multicast DNS technology on large scale networks, NetworkWorld reports that the company is proposing a new standard that can be built to support huge numbers of users at once.